Furnace grate



May 20 1924'.

J. A. HAFER FURNACE GRA'I'E Filed Jan. 16 1920 I cwywn fa 7723915 ,4 N 5m. MU 3 Patented May 20, 1924.

warren srarss 1,494,625 PATENT OFFICE.

JAMES A. HAFER, OF GHAMBERSBURG, PENNSYLVANIA.

FURNACE GRATE.

Application filed January 16, 1920. Serial No. 351,939.

To all whom it may concern Be it known that I, James A. HAFER, a citizenof the United States, residing at Chambersburg, in the county ofFranklin and State of Pennsylvania, have invented certain new and usefulImprovements in Furnace Grates; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The present invention relates to furnace grates, and particularly tothat type wherein the grate bars are mounted to rock upon the grateframe.

The object is to provide an improve means for anchoring the grate barsin the frame and for protecting the anchoring means against excessiveheat of fuel burning on the grate bars; to provide an improved mountingfor the legs which support the frame and which admit of removal of thelegs and adjustment thereof for facilitating transportation of the grateand adjustment of the same in setting it up in a furnace;

and to provide an improved bracket and latch for supporting and lockingthe shaker lever to maintain the grate bars, in their normal position ofrest. I

With these and further objects in view as will in part hereinafterbecome apparent and in part be stated, the invention comprises certainnovel constructions, combinations and arrangements of parts assubsequently specified and claimed.

In the accompanying drawing,-

Figure 1 is a perspective view of a furnace grate constructed accordingto. the present invention, certain of the protective caps being removedto -expose the supporting bars.

Figure 2 is a fragmentary, enlarged section taken through a portion ofthe same showing the detachable leg mounting and the arrangement of thebridge iron for anchoring the grate bar to the frame.

Figure 3 is an enlarged, side elevation of a portion of the frameshowing a grate bar mounted thereon according to this invention.

Figure 4 is a section taken through th same substantially on the line 44of Figure 3.

Referring to the drawing by numerals, 10 designates the side of a grateframe upon which grate bars 11 are mounted, each of said bars comprisingthe supporting bar 12 and the grate sections 13, the latter beingmounted upon the upper edge of the bar 12 and adapted to be fittedtogether for form ing a supporting surface for fuel to be burned.Theside'lO of the frame is provided with suitably spaced-apart bearings14 which rise from the upper edge of the frame and which haveverticalslotsor recesses 15' opening through the top of the bearings 14and adapted to receive trunnions 16 formed on the ends of the supportingbars 12. The supporting bar 12 is provided with a detachable protectivecap 17 which is preferably made of an integral casting of a widthcorresponding substantially to three grate sectionsand which is providedwith spaced-apart pairs of depending legs 18 for positioning at theopposite sides of the upstanding bearing 14. Shoulders 19 and 20 areformed. on the bar 12 by the formation of the recess and trunnion 16.These shoulders 19 and 20 extend in the spaces between the pairs of legs18 and, as particularly shown in Figure 4, are preferably grooved, as at21, at opposite sides to receive correspondingly formed pro jections orribs on the legs 18. The grooves 21 thus serve to hold the protectivecaps 17 from shifting laterally of the bearing 14. Adjacent the bearing14 the side 10 of the frame is provided with webs 22 formed preferablyintegral therewith and bridging the spaces between adjacent upstandingbearings. A bridge iron 23 is bolted or otherwise detachably secured byfastening means 24 to the webs 22 against the outer faces of the same.The bridgeiron 23 extends across the outer side of'the bearing 14 andbetween the same and the outer shoulder 20. The bridge iron 23 extendsacross the top of the trunnion 16 and holds the same from rising in thebearing 14. The bridge iron is thus protected by the cap 17 and at thesame time permits the free rocking of the grate bar and holds the samefrom lifting out of its bearing.

Any number of bridge irons 23 may be employed, but preferably one ateach end only of the grate bar, as these retain the adjacent trunnions16 from rising out of their bearings, and through the depending rockingarms 25 and the connecting bar 26 prevent the other trunnions 16 alsofrom rising out of their bearings.

Each grate bar is provided with a depending rocking arm 25 andtherocking arms 25 are pivoted to a connecting bar 26 which extendslongitudinally of the frame and which has pivotal connection at itsforward end by means of a bolt 27 to the lower end of a '7 shaking lever28. The lever 26 is pivoted at adapted to receive the opposite ends of apin projecting through and beyond the opposite sides of the shakinglever 28. Thus, the latch 33 holds the shaking lever in normal positionand the lever, through the various connections, maintains the grate barsin proper position for supporting the fuel during consumption. The latch33 may be quickly raised upon the ears 32 to release the lever 28 whenit is desired to shake the V grate.

The frame is supported upon legs which comprise upper sections 36 andlower sections 37 detaohably'and adjustably connected together by bolts38 whichpass through overlapping adjacent endsof the leg sections. Theoverlapping ends of the leg sections are provided with opposed serratedfaces adapted to intermesh when the bolts 38 are tightened to hold thelegs in adjusted position. The upper ends of the leg sections 36 areprovided upon their inner sides with supporting shoulders 39 andupstanding reduced portions 40. The shoulders 39 engage beneath the edgeof the side 10 of the grate frame while the portions 40 extend upa framehaving a side bearing and webs adacent the bearing, a supporting barhaving a trunnion seated in the bearing, a protective cap for the end ofthe bar straddling the bearing to protect the same, and a bridge ironsecured at its oppositeends to said webs and extending across the top ofsaid trunnion to maintain the same in the bearing.

2. In a furnace grate, the combination of a frame having an upwardlyopen-ing hearing and webs at opposite sides of the bearing, a supportingbar having a trunnion seated in the bearing and provided withupstandingshoulders at opposite sides of the bearing, a protective capfor the end of the supporting bar straddling the bearing to protect thesamepand a bridge iron secured to said webs and projecting acrossthetrunnion beneath the cap to maintain the trunnion in the bearing.- o

In testimony whereofI affix my signature in presence of two witnesses.

7 JAMES A. HAFER. Witnesses H. B. MCNULTY, CHAS. A. DANFELT.

